Coolant supply systems



April 5 1958 E. H. LANDIS 2,830,740

COOL-ANT SUPPLY SYSTEMS 2 Sheets-Sheet 1 Filed Nov. 12, 1954 FIG.|

Inventor April 15, 1958 E. H. ,LANDIS 2,830,740

COOL-ANT SUPPLY SYSTEMS Filed Nov. 12, 1954 2 Sheets-Sheet 2 v EL F 2 22'24 3 INVENT R United States Patent COOLANT SUPPLY SYSTEMS Earle H.Landis, Wood-Ridge, N. J.

Application November 12, 1954, Serial No. 468,310 4 Claims. (01. 222-119This invention relates to a device for supplying coolant to machinetools such as a drill press, lathe, milling machine, and the like. Theprimary object of this invention being to provide a simplified and moresatisfactory method of supplying coolant.

Another object being to supply a compact, portable coolant supplyingdevice that can be easily moved and used on any machine as needed,simply by snapping on to an air hose.

Still another object 'being to provide a coolant supplying device thatis easily constructed, maintained and operated by air pressure, workedby a foot pedal.

Other objects and advantages will be seen in the details of constructionand operation as more fully described and claimed in the followingdescription and in the accom panying drawings in which:

Fig. l is a side view of a conventional drill press showing thepneumatic coolant supply in position ready to be .used by the operator.

Fig. 2 is a cross section view of the foot pedal shut-off valve.

Fig. 3 is a cross section view of the coolant supply tank and foot pedalassembly.

Fig. 4 is a cross section view of the filler cap and the coolantstrainer.

Fig. 5 is a top view of supply tank and foot pedal assembly.

The same reference numerals throughout the several views indicate thesame parts.

The present conventional oil pumps that are built into the machines andothers that have to be attached to the machines are of the constant flowtype, resulting in a waste of oil and a loss of etficiency of theoperator. Another means of supplying oil to the work piece or to thecutting tool is by hand with an oil brush or an oil can, also resultingin a loss of time by the operator. With the present motor driven oilpumps, there is the problem of the motor-s deteriorating; the linesoften become clogged, resulting in the loss of time that is necessary toclean out the line and the reservoir. The oil pumps presently used arepermanently attached to the individual machine, and when they are not inuse they very often get in the way of the operator.

With the pneumatic coolant supply unit these difliculties are overcomeby a thoroughly simplified means of supplying coolant only when it isneeded. This means there is not any excess oil wasted or flowing overthe machine and the work piece making it diflicult for the opera-tor tohandle the work and the machine. So little oil is used that the returnis eliminated, which in turn eliminates the hazard of clogged lines.This also cuts down a good deal of the expense in manufacturing of theprodduct. With this greatly improved coolant supply, the operator isfree at all times to use both hands on the work, and when oil is needed,the foot pedal is pressed to the degree of the amount of oil necessary.Not being exposed to an excess of oil will help to prevent the oil rashmany men develop.

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Referring now to Fig. 1 of the drawings, a conventional drill press isshown with pneumatic coolant supply-unit in the manner in which it isused. The air line 1, which has a Schrader snap-on coupling 2, issnapped on to the pneumatic coolant supply unit. The air passes througha pressure regulating valve into the check valve and then into the oilsupply tank 3. This supply tank 3 is recommended to hold approximatelyfive gallons. Whenever oil is needed, the operator presses down on thefoot pedal 4 which has a spring 5 that acts as a stop to prevent abuseof the shut-01f valve 7. The foot pedal 4 is connected to the shut-0Evalve 7 by a link 6. When pressure is applied to the foot pedal 4, theshut-oif valve 7 opens, allowing oil to pass through into the oil line9, through the nozzle 18 and onto the work. A special fan or spread typenozzle can be supplied for lathe work. The oil line 9 is held inposition by a strap clamp 19 having a support for the metal hose 9. Thestrap clamp 19 has a wing nut that is easily opened to move the strapclamp 19 up and down the drill press column 28.

Referring now to Fig. 2 of the drawings, the shut-off valve 7; the valveconnector 14 is attached to the link 6 by a rod 20 and is held securelyin place by a lock nut 13. When pressure is applied to the foot pedal 4it pulls the valve 17 down. The valve stem passes through a gland nut 12that has plastic O-rings on the interior and exterior of the nut 12.This prevents leakage. The valve spring 2 compresses and the valve 17goes down allowing the oil to go through the valve 7 from drilled hole16 to drilled hole MA, on into the oil line 9 and onto the work.

The valve 7 is recommended, however if a standard valve exists that willperform the same function, as well, it can be substituted.

Referring now to Fig. 3 of the drawings which is a cross section view ofthe coolant supply tank and foot pedal assembly; the coolant supply tank3 is constructed of A3" steel tubing with flanged and dished heads 29 ofA5" steel welded onto the steel tubing. (All welds are designated by22.) The tank 3 is then welded onto the base 30, being also /s" steel.The pedal supports or side walls 31 are bent up to support the footpedal 4 to prevent side play. The check valve is screwed into a threadedcollar 23 that is pressed into the top head 29 and then welded. The oilflows through a fine strainer 25 that is soldered onto the elbow 27having a Ma" pipe thread. The elbow 27 is held in position by the collar23 that is pressed into the bottom head 29 and then welded. The oilpasses through the elbow 27 into a Titefiex hose 9, or similar, thusgoing up to the valve 7. The valve 7 is held onto the tank 3 by A1 20bolts that screw into a /s" thick plate that is welded onto the side ofthe tank 3. The foot pedal spring 5 is held in position by a springlocator 21 that can be either welded or bolted to the base 30. Thehandle 24 is welded onto the top head 29 to make it convenient to move.

Referring now to Fig. 4 of the drawings, an enlarged cross section viewof the filler cap 3 shows a threaded section of pipe 26 that is screwedinto the top head 29 and welded from the inside, as shown in Fig. 3.Another strainer 25 is soldered on the top lip of the threaded pipe 26so that when coolant supply tank 3 is filled with oil, no dirt willenter the tank. A plastic O-ring 15 is inserted over the threadedsection of pipe 26 so that when filler cap 8 is screwed down it willmake an air tight seal. Referring now to Fig. 5 of the drawings, a topview of the coolant supp-1y tank and pedal assembly showing the valvelink 6 that is comprised of two pieces of A" steel, one on either sideof the valve connector 14 at the top, and of the foot pedal 4 at thebottom. The purpose of this double link 6 is to prevent rocking o thefoot pedal 4.

It is believed the details of construction, operation and advantages ofthe device will be easily understood from the foregoing without furtherdetailed explanation. It is understood that'the drawings and disclosurespresented herewith are by way of example only, rather than by way oflimitation, and that without changing the basic in vention, theconstruction may be varied within the scope of the appended claims.

What is claimed is:

1. A compact coolant supply system comprising a tank to contain a supplyof cooling fluid, said tank having sidewalls extending below the bottomof the. tank and terminating in a base portion adapted to rest upon thefloor, means coupled to said tank to maintain said fluid under constantpressure, a valve body carried by a side wall of said tank, meanscoupling the input of said valve body to said tank adjacent the bottomportion thereof, a valve member movably disposed in said valve body tocontrol flow of fluid therethrough, a foot pedal carried by the baseportion of said tank and means coupling said foot pedal to said valvemember for actuation thereof when flow of fluid is required.

2. A compact coolant supply system comprising a tank to contain a supplyof cooling fluid, said tank having side walls extending below the bottomof the tank to form the base, said base having a portion extendedoutwardly to one side of said tank, a valve body, means coupling theinput of said valve body to the bottom portion of said tank, said valvebody having a valve member movably disposed therein to control passageof fluid therethrough, means pivoting a foot pedal on said extendedportion, and means linking said valve member to said pedal for actuationof said valve member by the foot of an operator when a flow of fluid isdesired.

3. A compact coolant supply system comprising a tank to contain a supplyof cooling fluid, means to maintain 4 said supply under pressure, saidtank having a base rim, a base plate secured to said rim and having sidewalls terminating adjacent the bottom of said rim into a portionextended outwardly to one side of said tank, the side edges of saidextended portion being turned upwardly, a foot pedal pivotally disposedbetween said side edges, a valve body having its inlet coupled to thebottom portion of said tank and a movable valve member coupled to saidpedal to control the passage through said valve body in accordance withfoot pressure applied to said pedal.

4. A compact coolant supply system comprising a tank to contain a supplyof cooling fluid, said tank having side walls terminating into a basehaving a portion extended outwardly to one side of said tank, saidextended portion having two upright flanges spaced apart, a foot pedalreceivable between said flanges, a pin carried by said flanges to pivotsaid pedal at the outer end thereof, a valve body supported on the side'wall-of said tank above said extended portion, means coupling the inputof said valve body to the bottom portion of said tank, a flexible hosecoupled to the output of said valve body, said valve body having a valvemember reciprocatably disposed therein to control the passage of fluidtherethrough, means linking said valve member to the inner end of saidpedal and a spring disposed between said pedal and said base to normallyurge said pedal toward valve closing position.

References Cited in the file of this patent UNITED STATES PATENTS 39,086Williams et al 1.. June 30, 1863 981,674 Neiberg Ian. 17, 1911 1,333,547Johnson Mar. 9, 1920 2,292,749 Feinson et al Aug. 11, 1942 2,494,147Trelease et al. Jan. 10, 1950 2,634,028 Brown Apr. 7, 1953 2,645,381Lat-tman July 14, 1953

